Quarter	Billions of US Dollars
1984-07-01	0.0500
1986-04-01	0.1000
1988-01-01	0.0752
1988-07-01	0.2682
1989-01-01	0.4560
1989-04-01	0.1134
1989-07-01	0.3274
1990-01-01	0.2912
1996-01-01	0.0750
1996-10-01	1.1266
1997-01-01	1.3228
1997-04-01	3.0900
1997-07-01	1.1250
1997-10-01	1.4955
1998-01-01	0.9963
1998-04-01	4.8397
1998-07-01	6.4401
2000-01-01	20.8689
2001-04-01	0.1000
2001-10-01	1.2527
2002-01-01	0.5365
2002-04-01	1.0000
2002-10-01	2.4295
2003-01-01	2.4500
2003-04-01	1.4750
2003-07-01	1.5740
2003-10-01	2.8250
2004-01-01	1.7400
2004-04-01	2.0750
2004-07-01	3.4749
2004-10-01	2.5400
2005-01-01	3.0657
2005-04-01	5.2361
2005-07-01	5.2221
2005-10-01	4.8821
2006-01-01	3.1143
2006-04-01	3.3449
2006-07-01	5.1570
2006-10-01	14.6922
2007-01-01	12.1411
2007-04-01	16.5359
2007-07-01	3.5408
2007-10-01	11.4735
2008-01-01	1.4734
2008-04-01	12.3506
2008-07-01	5.9156
2008-10-01	0.4778
2009-01-01	0.9166
2009-04-01	5.0205
2009-07-01	5.3289
2009-10-01	2.8032
2010-01-01	7.7289
2010-04-01	7.0145
2010-07-01	11.4011
2010-10-01	18.1890
2011-01-01	6.9820
2011-04-01	9.8382
2011-07-01	2.0018
2011-10-01	4.1896
2012-01-01	20.0974
2012-04-01	11.6816
2012-07-01	28.4675
2012-10-01	24.7561
2013-01-01	18.0366
2013-04-01	17.1851
2013-07-01	12.2731
2013-10-01	12.0653
2014-01-01	6.9283
2014-04-01	6.3533
2014-07-01	2.7037
2014-10-01	2.9551
2015-01-01	0.6774
2015-04-01	0.5968